Hello. My Brahmas went from a single level coop as pullets to a mobile coop on legs as hens and rooster. They have an open run and are essentially free range. I have tried locking them up in there for a few weeks and have a light in there but they will not go up the ramp. They roost under the coop. The hens are not laying yet so that is good but I need them in there at night. We have most of the typical predators but have not had any issues until we do. Any other tips I can try other than the light and locking them in?